# This file contains all the views that concern the page model
from django.shortcuts import render, redirect, get_object_or_404
from django.views.generic import ListView, DetailView
from django.views.generic.edit import UpdateView, CreateView
from django.contrib.auth.decorators import login_required, permission_required
from django.utils.decorators import method_decorator
from django.forms.models import modelform_factory
from django.forms import CheckboxSelectMultiple

from core.models import Page, PageRev, LockError
from core.views.forms import PagePropForm
from core.views import CanViewMixin, CanEditMixin, CanEditPropMixin

class PageListView(CanViewMixin, ListView):
    model = Page
    template_name = 'core/page_list.jinja'

class PageView(CanViewMixin, DetailView):
    model = Page
    template_name = 'core/page_detail.jinja'

    def get_object(self):
        self.page = Page.get_page_by_full_name(self.kwargs['page_name'])
        return self.page

    def get_context_data(self, **kwargs):
        context = super(PageView, self).get_context_data(**kwargs)
        if "page" not in context.keys():
            context['new_page'] = self.kwargs['page_name']
        return context

class PageHistView(CanViewMixin, DetailView):
    model = Page
    template_name = 'core/page_hist.jinja'

    def get_object(self):
        self.page = Page.get_page_by_full_name(self.kwargs['page_name'])
        return self.page

class PageRevView(CanViewMixin, DetailView):
    model = Page
    template_name = 'core/page_detail.jinja'

    def get_object(self):
        self.page = Page.get_page_by_full_name(self.kwargs['page_name'])
        return self.page

    def get_context_data(self, **kwargs):
        context = super(PageRevView, self).get_context_data(**kwargs)
        if self.page is not None:
            context['page'] = self.page
            try:
                rev = self.page.revisions.get(id=self.kwargs['rev'])
                context['rev'] = rev
            except:
            # By passing, the template will just display the normal page without taking revision into account
                pass
        else:
            context['new_page'] = self.kwargs['page_name']
        return context

class PageCreateView(CanEditPropMixin, CreateView):
    model = Page
    form_class = modelform_factory(Page,
            fields = ['parent', 'name', 'owner_group', 'edit_groups', 'view_groups', ],
            widgets={
                'edit_groups':CheckboxSelectMultiple,
                'view_groups':CheckboxSelectMultiple,
                })
    template_name = 'core/page_prop.jinja'

    def get_initial(self):
        init = {}
        if 'page' in self.request.GET.keys():
            page_name = self.request.GET['page']
            parent_name = '/'.join(page_name.split('/')[:-1])
            parent = Page.get_page_by_full_name(parent_name)
            if parent is not None:
                init['parent'] = parent.id
            init['name'] = page_name.split('/')[-1]
        return init

    def get_context_data(self, **kwargs):
        context = super(PageCreateView, self).get_context_data(**kwargs)
        context['new_page'] = True
        return context

    def form_valid(self, form):
        form.instance.set_lock(self.request.user)
        return super(PageCreateView, self).form_valid(form)

class PagePropView(CanEditPropMixin, UpdateView):
    model = Page
    form_class = modelform_factory(Page,
            fields = ['parent', 'name', 'owner_group', 'edit_groups', 'view_groups', ],
            widgets={
                'edit_groups':CheckboxSelectMultiple,
                'view_groups':CheckboxSelectMultiple,
                })
    template_name = 'core/page_prop.jinja'
    slug_field = '_full_name'
    slug_url_kwarg = 'page_name'

    def get_object(self):
        o = super(PagePropView, self).get_object()
        # Create the page if it does not exists
        #if p == None:
        #    parent_name = '/'.join(page_name.split('/')[:-1])
        #    name = page_name.split('/')[-1]
        #    if parent_name == "":
        #        p = Page(name=name)
        #    else:
        #        parent = Page.get_page_by_full_name(parent_name)
        #        p = Page(name=name, parent=parent)
        self.page = o
        try:
            self.page.set_lock_recursive(self.request.user)
        except LockError as e:
            raise e
        return self.page

class PageEditView(CanEditMixin, UpdateView):
    model = PageRev
    fields = ['title', 'content',]
    template_name = 'core/pagerev_edit.jinja'

    def get_object(self):
        self.page = Page.get_page_by_full_name(self.kwargs['page_name'])
        if self.page is not None:
            # First edit
            if self.page.revisions.all() is None:
                rev = PageRev(author=request.user)
                rev.save()
                self.page.revisions.add(rev)
            try:
                self.page.set_lock(self.request.user)
            except LockError as e:
                raise e
            return self.page.revisions.last()
        return None

    def get_context_data(self, **kwargs):
        context = super(PageEditView, self).get_context_data(**kwargs)
        if self.page is not None:
            context['page'] = self.page
        else:
            context['new_page'] = self.kwargs['page_name']
        return context

    def form_valid(self, form):
        # TODO : factor that, but first make some tests
        rev = form.instance
        new_rev = PageRev(title=rev.title,
                          content=rev.content,
                          )
        new_rev.author = self.request.user
        new_rev.page = self.page
        form.instance = new_rev
        return super(PageEditView, self).form_valid(form)